Realtek HD SPDIF Cuts in and Out on Windows 7

Realtek HD SPDIF Cuts in and Out on Windows 7

I've got an HP retail HTPC that has a Realtek HD onboard sound card and I'm running SPDIF out to my Onkyo reciever. For the longest time, it worked pretty darned well. The only oddity was that flipping a lightswitch or something of the sort would make the sound cut out for about a second (weird, I know. But, it was ignorable).